Hi new to this forum but it seems to be full of information so Im posting to see if it can help me...
I bought a 2008 Chap 215 with VP 5.0 GXI @ 270hp at the start of the years and it has never run right for me, when I first bought it was fully serviced by the local Poole Marina (yeah right...) I got the boat home and ran it only to discover 180L of dirty 2 year old fuel in the tank....Which I ran through the engine, breaking down with me and wrecking the fuel pump (dreaded whine). I had too flush out tank, fuel lines and replaced the fuel pump and the boat seemed to run at its best for a day or so after this......
......Then slowly over the past few outings (I go out 4-5 times a month) the engine performance has been decreasing...first month I couldn't get past 4200rpm & 37mph, so I changed the prop as I knew the current prop had been damaged and thought it was causing the lack of top rpm. I went from a 19 pitch 3 blade to a 20 pitch 4 blade...it came recommended by some people with the same boat/engine
I then ran worse @ 3700rpm max where I then changed out the spark plugs as I thought it may be down a cylinder...the 8 month old spark plugs were very clean and looked perfect.
Today it wouldn't even plain and struggled to go past 3000rpm where the engine then popped (i presume back firing). I haven't tried to repeat the problem yet...will do soon with a set of fuel pressure gauges....the fuel pump had not been giving any concern as its operation was quiet...no dreaded whine
After the engine back firing today do you think my timing may be out...do the VPs have a timing chain? Some mentioned to me it may be slightly out....first time the engine has back fired but the exhaust did smell gas rich today but usually I don't get this problem..
Previously when the engine runs it sounds sweet, never stales, cuts out or back fires until now.....
I regularly change the fuel filter and have checked the regulator both which were clean...I would hope a new fuel pump would last longer than 3-4 months but I will check the pressures at the weekend to rule out.....the fuel pump hasnt been noisey at all whilst trying to achieve WOT
My local VP mech/dealer has been involved in the whole process but has brought nothing to the table and only seems to look at what I steer him too??? Happy to take my money but not interested in fixing the problems..
Any advice appreciated .....Cheers
I bought a 2008 Chap 215 with VP 5.0 GXI @ 270hp at the start of the years and it has never run right for me, when I first bought it was fully serviced by the local Poole Marina (yeah right...) I got the boat home and ran it only to discover 180L of dirty 2 year old fuel in the tank....Which I ran through the engine, breaking down with me and wrecking the fuel pump (dreaded whine). I had too flush out tank, fuel lines and replaced the fuel pump and the boat seemed to run at its best for a day or so after this......
......Then slowly over the past few outings (I go out 4-5 times a month) the engine performance has been decreasing...first month I couldn't get past 4200rpm & 37mph, so I changed the prop as I knew the current prop had been damaged and thought it was causing the lack of top rpm. I went from a 19 pitch 3 blade to a 20 pitch 4 blade...it came recommended by some people with the same boat/engine
I then ran worse @ 3700rpm max where I then changed out the spark plugs as I thought it may be down a cylinder...the 8 month old spark plugs were very clean and looked perfect.
Today it wouldn't even plain and struggled to go past 3000rpm where the engine then popped (i presume back firing). I haven't tried to repeat the problem yet...will do soon with a set of fuel pressure gauges....the fuel pump had not been giving any concern as its operation was quiet...no dreaded whine
After the engine back firing today do you think my timing may be out...do the VPs have a timing chain? Some mentioned to me it may be slightly out....first time the engine has back fired but the exhaust did smell gas rich today but usually I don't get this problem..
Previously when the engine runs it sounds sweet, never stales, cuts out or back fires until now.....
I regularly change the fuel filter and have checked the regulator both which were clean...I would hope a new fuel pump would last longer than 3-4 months but I will check the pressures at the weekend to rule out.....the fuel pump hasnt been noisey at all whilst trying to achieve WOT
My local VP mech/dealer has been involved in the whole process but has brought nothing to the table and only seems to look at what I steer him too??? Happy to take my money but not interested in fixing the problems..
Any advice appreciated .....Cheers